Temperature dependence of spin-orbit torques in W/CoFeB bilayers

Witold Skowroński, Monika Cecot, Jarosław Kanak, Sławomir Ziȩtek, Tomasz Stobiecki, Lide Yao, Sebastiaan Van Dijken, Takayuki Nozaki, Kay Yakushiji, Shinji Yuasa

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We report on the temperature variation of spin-orbit torques in perpendicularly magnetized W/CoFeB bilayers. Harmonic Hall voltage measurements in perpendicularly magnetized CoFeB reveal increased longitudinal and transverse effective magnetic field components at low temperatures. The damping-like spin-orbit torque reaches an efficiency of 0.55 at 19 K. Scanning transmission electron microscopy and X-ray reflectivity measurements indicate that considerable interface mixing between W and CoFeB may be responsible for strong spin-orbit interactions.

Original languageEnglish
Article number062407
Pages (from-to)1-4
JournalApplied Physics Letters
Issue number6
Publication statusPublished - 8 Aug 2016
MoE publication typeA1 Journal article-refereed


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